Count rows in result of SQL query
To receive quantity of rows of the returned records of SQL query, you should use function @@ROWCOUNT. Function @@ROWCOUNT returns the quantity of rows, which were used in a query.
SELECT Id, Name, Position from Users
Result is: 188
In this case it means that table "Users" has 188 records because it returns all rows.
One of practice tutorials for the function @@ROWCOUNT is to count how many rows where updated after SQL update query. You can see an example of usage @@ROWCAOUNT after update:
UPDATE Users SET IsBoss = 1 where Level > 3
declare @S int = @@ROWCOUNT
IF @@ROWCOUNT = 0
SELECT 'Nothing updated'
The value of @@ROWCOUNT has been changed after each query. That’s why in this example you can see the variable @S which value is equal to @@ROWCOUNT after UPDATE query.